LAMOST J2043+3413—a Fast Disk Precession SW Sextans Candidate in Period Gap
We present follow-up photometric observations and time-series analysis of a nova-like, SW Sextans-type, cataclysmic variable (CV) candidate, LAMOST J204305.95+341340.6 (hereafter J2043+3413), with a Gaia G -band magnitude of 15.30 and a distance of 990 pc, which was identified from the LAMOST spectr...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2023-01-01
|
| Series: | The Astronomical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-3881/acdd70 |
| _version_ | 1827828636441378816 |
|---|---|
| author | Xin Li Xiaofeng Wang Jiren Liu Jincheng Guo Ziping Zhang Yongkang Sun Xuan Song Cheng Liu |
| author_facet | Xin Li Xiaofeng Wang Jiren Liu Jincheng Guo Ziping Zhang Yongkang Sun Xuan Song Cheng Liu |
| author_sort | Xin Li |
| collection | DOAJ |
| description | We present follow-up photometric observations and time-series analysis of a nova-like, SW Sextans-type, cataclysmic variable (CV) candidate, LAMOST J204305.95+341340.6 (hereafter J2043+3413), with a Gaia G -band magnitude of 15.30 and a distance of 990 pc, which was identified from the LAMOST spectrum. The photometric data were collected with the Tsinghua-NAOC 0.8 m telescope (TNT), Transiting Exoplanet Survey Satellite (TESS), Zwicky Transient Facility (ZTF), and ASAS-SN. The TESS light curve reveals the presence of two prominent periods of 2.587(8) hr and 1.09(5) days, corresponding to the orbital and superorbital (precession) period, respectively. The TNT data obtained in 2020 shows a possible quasiperiodic oscillation of 1426 s. The precession period is about three times shorter than that of CVs with similar orbital periods, indicating an unusually fast precessing accretion disk. The ZTF data is found to show a sudden decline of ∼0.4 mag on MJD 58979. From the intermittent behavior of the eclipse, we deduce that J2043+3413 is an intermediate inclination system of CV, similar to V795 Her, which is also situated in the period gap. |
| first_indexed | 2024-03-12T03:52:16Z |
| format | Article |
| id | doaj.art-3363f3729c5549fdac7568eb88d11fc0 |
| institution | Directory Open Access Journal |
| issn | 1538-3881 |
| language | English |
| last_indexed | 2024-03-12T03:52:16Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj.art-3363f3729c5549fdac7568eb88d11fc02023-09-03T12:10:22ZengIOP PublishingThe Astronomical Journal1538-38812023-01-0116625610.3847/1538-3881/acdd70LAMOST J2043+3413—a Fast Disk Precession SW Sextans Candidate in Period GapXin Li0https://orcid.org/0000-0001-5879-8762Xiaofeng Wang1Jiren Liu2https://orcid.org/0000-0002-0210-5813Jincheng Guo3https://orcid.org/0000-0002-8321-1676Ziping Zhang4Yongkang Sun5https://orcid.org/0000-0002-3935-2666Xuan Song6Cheng Liu7Beijing Planetarium, Beijing Academy of Science and Technology , Beijing 100044, People’s Republic of China ; lixin@bjp.org.cnBeijing Planetarium, Beijing Academy of Science and Technology , Beijing 100044, People’s Republic of China ; lixin@bjp.org.cn; Physics Department, Tsinghua University , Beijing 100084, People’s Republic of ChinaBeijing Planetarium, Beijing Academy of Science and Technology , Beijing 100044, People’s Republic of China ; lixin@bjp.org.cnBeijing Planetarium, Beijing Academy of Science and Technology , Beijing 100044, People’s Republic of China ; lixin@bjp.org.cnBeijing Planetarium, Beijing Academy of Science and Technology , Beijing 100044, People’s Republic of China ; lixin@bjp.org.cnNational Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People’s Republic of China; School of Astronomy and Space Science, University of Chinese Academy of Sciences , Beijing 100049, People’s Republic of ChinaBeijing Planetarium, Beijing Academy of Science and Technology , Beijing 100044, People’s Republic of China ; lixin@bjp.org.cnBeijing Planetarium, Beijing Academy of Science and Technology , Beijing 100044, People’s Republic of China ; lixin@bjp.org.cnWe present follow-up photometric observations and time-series analysis of a nova-like, SW Sextans-type, cataclysmic variable (CV) candidate, LAMOST J204305.95+341340.6 (hereafter J2043+3413), with a Gaia G -band magnitude of 15.30 and a distance of 990 pc, which was identified from the LAMOST spectrum. The photometric data were collected with the Tsinghua-NAOC 0.8 m telescope (TNT), Transiting Exoplanet Survey Satellite (TESS), Zwicky Transient Facility (ZTF), and ASAS-SN. The TESS light curve reveals the presence of two prominent periods of 2.587(8) hr and 1.09(5) days, corresponding to the orbital and superorbital (precession) period, respectively. The TNT data obtained in 2020 shows a possible quasiperiodic oscillation of 1426 s. The precession period is about three times shorter than that of CVs with similar orbital periods, indicating an unusually fast precessing accretion disk. The ZTF data is found to show a sudden decline of ∼0.4 mag on MJD 58979. From the intermittent behavior of the eclipse, we deduce that J2043+3413 is an intermediate inclination system of CV, similar to V795 Her, which is also situated in the period gap.https://doi.org/10.3847/1538-3881/acdd70Cataclysmic variable starsNova-like variable starsStellar accretion disksEclipsing binary stars |
| spellingShingle | Xin Li Xiaofeng Wang Jiren Liu Jincheng Guo Ziping Zhang Yongkang Sun Xuan Song Cheng Liu LAMOST J2043+3413—a Fast Disk Precession SW Sextans Candidate in Period Gap The Astronomical Journal Cataclysmic variable stars Nova-like variable stars Stellar accretion disks Eclipsing binary stars |
| title | LAMOST J2043+3413—a Fast Disk Precession SW Sextans Candidate in Period Gap |
| title_full | LAMOST J2043+3413—a Fast Disk Precession SW Sextans Candidate in Period Gap |
| title_fullStr | LAMOST J2043+3413—a Fast Disk Precession SW Sextans Candidate in Period Gap |
| title_full_unstemmed | LAMOST J2043+3413—a Fast Disk Precession SW Sextans Candidate in Period Gap |
| title_short | LAMOST J2043+3413—a Fast Disk Precession SW Sextans Candidate in Period Gap |
| title_sort | lamost j2043 3413 a fast disk precession sw sextans candidate in period gap |
| topic | Cataclysmic variable stars Nova-like variable stars Stellar accretion disks Eclipsing binary stars |
| url | https://doi.org/10.3847/1538-3881/acdd70 |
| work_keys_str_mv | AT xinli lamostj20433413afastdiskprecessionswsextanscandidateinperiodgap AT xiaofengwang lamostj20433413afastdiskprecessionswsextanscandidateinperiodgap AT jirenliu lamostj20433413afastdiskprecessionswsextanscandidateinperiodgap AT jinchengguo lamostj20433413afastdiskprecessionswsextanscandidateinperiodgap AT zipingzhang lamostj20433413afastdiskprecessionswsextanscandidateinperiodgap AT yongkangsun lamostj20433413afastdiskprecessionswsextanscandidateinperiodgap AT xuansong lamostj20433413afastdiskprecessionswsextanscandidateinperiodgap AT chengliu lamostj20433413afastdiskprecessionswsextanscandidateinperiodgap |